A team of researchers from Swansea University, using the University’s Centre for NanoHealth, say they have developed a highly sensitive graphene biosensor with the capability to detect molecules which show signs of increased cancer risk.
They say the newly developed graphene biosensor could ultimately help to provide a rapid diagnosis at the point of care.
In comparison with other bioassay tests, the sensor was over five times more sensitive.
Conventionally, graphene is produced by stripping layers from graphite.
However for a biosensor, a large substrate area is required in order to produce patterned graphene devices.
The researchers used conditions of low pressure and very high temperatures in order to grow graphene on a substrate of silicon carbide.
The graphene devices were then patterned by using methods similar to those used when processing semiconductors.
The team then attached antibody bioreceptor molecules that could bind to specific target molecules in urine, saliva or blood.